US Bridges

Santa Rita RD over Arroyo Mocho

Fair

Alameda County, California · 0.4 MI S/O Tassajara RD · Structure no. 33C0099

Built
1974
51 years old, rebuilt 1985
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
140 ft
2 main spans
Daily traffic
37,200
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Santa Rita RD over Arroyo Mocho is a concrete continuous box beam or girders - multiple carrying Santa Rita RD over Arroyo Mocho in Alameda County, California. It was built in 1974 and reconstructed in 1985, so it is 51 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 37,200 vehicles a day, roughly 2% of them trucks, projected to reach 40,920 by 2041. The structure is 140 ft (42.7 m) long and 140 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSanta Rita RD
CrossesArroyo Mocho
Location0.4 MI S/O Tassajara RD
RouteCity Street 0
CountyAlameda County
StateCalifornia
Coordinates37.68888, -121.87784
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.7 US tons
Inventory rating43.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length140 ft (42.7 m)
Longest span68 ft (20.7 m)
Deck width140 ft (42.8 m)
Roadway width100 ft (30.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,200 (2023)
Projected traffic40,920 by 2041
Trucks2%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Santa Rita RD over Arroyo Mocho built?

It was built in 1974, making it 51 years old in 2025. It was reconstructed in 1985.

What condition is Santa Rita RD over Arroyo Mocho in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2023.

How much traffic does Santa Rita RD over Arroyo Mocho carry?

About 37,200 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Santa Rita RD over Arroyo Mocho?

The structure is 140 ft (42.7 m) long with a longest span of 68 ft (20.7 m) and a deck 140 ft wide.

Who owns Santa Rita RD over Arroyo Mocho?

It is owned by the City or Municipal Highway Agency.